BirdAnalyst
Species · Nebraska · BBS 2025 Release · 1966–2024

Double-crested Cormorant Population Trend in Nebraska

All statesWetland birds

Double-crested Cormorant in Nebraska has declined: down 49% on the route-weighted index since 1980.

-49%Since 1980
24Routes In State
45Years

Notable Double-crested Cormorant Trends in Nebraska

No notable trend signals for Double-crested Cormorant in Nebraska. See the full index history below.

Double-crested Cormorant Population Forecast in Nebraska

If the recent trend holds, Double-crested Cormorant in Nebraska is projected to stay roughly flat through 2029, near 0.27 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±273%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.27Projected 2029 index
0.00–1.995% range
±273%Backtest error
19742029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.320.002.0
20260.300.002.0
20270.290.002.0
20280.280.002.0
20290.270.001.9

Double-crested Cormorant Survey Routes in Nebraska

Routes recording Double-crested Cormorant in Nebraska.
Kennedy1720171993
Piester Lake1420231974
Oglala Nat. Grass.1220192001
Crescent Lk1120141980
Johnson719881988
Crookston720192019
Sumner619971997
Almeria519921992
Kenesaw420022002
Arthur320232004
Paxton220161985
Brownlee220241995
Mullen220032001
Nenzel220212021
Agate 2120182018
Belvidere120222019
Seward120012001
Gretna120182007
Surprise120222022
Richland120041991
Swan Lake120211983
Gordon120162001
Murray Lake120111992
Wheeler Co120112011

Double-crested Cormorant Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.